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Amazing United COS to IAD Flight Deals

The cheapest flights to Washington Dulles Intl. found within the past 7 days were round trip and $128 one way. Prices and availability subject to change. Additional terms may apply.


IAD From COS Economy Coach Packages on Similar Airlines


FAQs about United Airlines Flights from COS to IAD

What terminal is United Airlines at Colorado Springs, CO (COS)?

Check your ticket to find out which Colorado Springs, CO (COS) terminal you'll be taking off from on your way to Washington, DC (IAD-Washington Dulles Intl.) with United Airlines. If you can't find the information on there, ask your airline.

Are there United Airlines non-stop flights from COS to IAD?

As you can't travel nonstop from Colorado Springs, CO (COS) to Washington, DC (IAD-Washington Dulles Intl.) with United Airlines, make the most of your layover. Shout yourself a few drinks at an inviting airport bar, or wander about the terminal and enjoy some retail therapy.

How long is an United Airlines flight from COS to IAD?

Weather and air traffic permitting, your United Airlines flight from Colorado Springs, CO (COS) to Washington, DC (IAD-Washington Dulles Intl.) should take an average of 4 hours and 39 minutes. That means you've got ample time to order your favorite drink, have a snooze and fine tune your travel program before you hit the runway.

How many direct and indirect flights does United Airlines fly from COS to IAD?

You can take your pick of roughly 5 United Airlines flights daily from COS to IAD.

If I am not able to travel due to COVID-19, can I change my booking to a later date?

For more info about changing your flight to Washington, DC (IAD-Washington Dulles Intl.), please visit our Customer Service Portal.

What is the best day to buy a plane ticket?

This just in! Airfares offered on Tuesdays tend to be the cheapest, according to flight demand on Travelocity in 2019. Wednesday and Friday prices are also good, but you may want to prepare your budget if booking on a Monday, as data shows the start of the week is when prices are generally at their highest.

What are the cheapest days to fly?

Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2019, flights departing on a Tuesday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.

How far in advance can you book a flight?

Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2019 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 1-2 weeks prior to their travel dates.

How can I save money on airline tickets?

We'll let you in on a secret...You can save big on flights if you mix and match your airlines and fare types. In fact, travelers who booked flights on Travelocity in 2019 saved nearly 50% when their return flights consisted of two different airlines or fare types.

*According to flight demand on Travelocity.com from January to December 2019. Savings are subject to change based on departure location, date and destination.

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*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.